冷再生技术是一种用于道路养护和改造的型施工方法，主要用于修复和升级旧沥青或水泥混凝土路面。其核心目的是通过回收利用旧路面材料，减少资源浪费和环境污染，同时提升道路性能。以下是冷再生的主要用途和特点：

　　Cold recycling technology is an environmentally friendly construction method used for road maintenance and renovation, mainly for repairing and upgrading old asphalt or cement concrete pavements. Its core purpose is to reduce resource waste and environmental pollution by recycling old road surface materials, while improving road performance. The following are the main uses and characteristics of cold regeneration:

　　1. 旧路面材料的循环利用

　　1. Recycling of old pavement materials

　　冷再生技术通过铣刨、破碎旧路面材料（如沥青层或水泥混凝土），加入新集料、再生结合料（如泡沫沥青、乳化沥青、水泥等）和水，在常温下重新拌和、摊铺、压实，形成新的道路基层或下面层。这一过程实现了旧材料的100%再利用，显著减少了建筑垃圾和新材料的开采需求。

　　Cold recycling technology forms new road base or lower surface layer by milling, crushing old pavement materials (such as asphalt layer or cement concrete), adding new aggregates, recycled binders (such as foam asphalt, emulsified asphalt, cement, etc.) and water, and re mixing, paving, and compacting at normal temperature. This process achieves 100% reuse of old materials, significantly reducing the demand for construction waste and new material extraction.

　　2. 减排与优势

　　2. Energy conservation, emission reduction, and environmental advantages

　　相比传统热拌沥青工艺（需加热160-180℃），冷再生无需加热，可节省60%以上的能源消耗，减少80%以上的二氧化碳排放。同时，避免了沥青烟等有害气体的产生，符合绿色施工要求。

　　Compared to the traditional hot mix asphalt process (which requires heating to 160-180 ℃), cold recycling does not require heating and can save over 60% of energy consumption and reduce over 80% of carbon dioxide emissions. At the same time, it avoids the generation of harmful gases such as asphalt smoke, which meets the requirements of green construction.

　　3. 提升道路性能与寿命

　　3. Improve road performance and lifespan

　　冷再生技术能有效原路面的深层病害（如裂缝、车辙），并通过优化材料级配和结构设计，增强路面的抗裂性和承载能力。例如，泡沫沥青再生层的动稳定度可达传统基层的3倍，部分案例中路面寿命延长15年。

　　Cold recycling technology can effectively eliminate deep diseases such as cracks and ruts on the original road surface, and enhance the crack resistance and bearing capacity of the road surface by optimizing material grading and structural design. For example, the dynamic stability of foam asphalt regeneration layer can reach three times of the traditional base course, and the pavement life in some cases can be extended to 15 years.

　　4. 经济的应用场景

　　4. Economically efficient application scenarios

　　适用范围广：适用于高速公路、国省干线、城市道路及机场跑道的大中修工程。

　　Wide applicability: Suitable for major and medium maintenance projects on highways, national and provincial trunk lines, urban roads, and airport runways.

　　成本节约：可降低施工成本20%-30%，缩短工期1/31/2。例如，江西吉康高速项目通过乳化沥青厂拌冷再生技术，每造价降低48%。

　　Cost savings: can reduce construction costs by 20% -30% and shorten the construction period by 1/3 to 1/2. For example, the Jikang Expressway project in Jiangxi Province has reduced the cost per kilometer by 48% through emulsified asphalt plant mixing cold recycling technology.

　　交通影响小：施工期间可部分开放交通，减少对公众出行的影响。

　　Low traffic impact: During the construction period, partial traffic can be opened to reduce the impact on public travel.

　　5. 技术分类与工艺选择

　　5. Technical classification and process selection

　　按施工方式：分为厂拌冷再生（材料运输拌和厂处理）和就地冷再生（现场一次性完成铣刨、拌和等工序）。

　　According to the construction method, it is divided into factory mixed cold recycling (material transportation to the mixing plant for processing) and on-site cold recycling (one-time completion of milling, mixing and other processes on site).

　　按结合料类型：包括泡沫沥青、乳化沥青和水泥冷再生，不同结合料适用于不同路况和性能需求。

　　According to the type of binder: including foam asphalt, emulsified asphalt and cement cold recycling, different binders are suitable for different road conditions and performance requirements.

　　总结

　　summary

　　冷再生技术通过“变废为宝”的方式，实现了资源循环、减排和道路性能提升的多重目标，是当前公路养护领域向绿色可持续发展转型的关键技术之一。其广泛应用案例（如江西昌九高速、河北G106国道等）已验证其成熟性和可靠性。

　　Cold recycling technology achieves multiple goals of resource recycling, energy conservation and emission reduction, and road performance improvement through the "turning waste into treasure" approach, and is one of the key technologies for the transformation of the current highway maintenance field towards green and sustainable development. Its widespread application cases (such as Jiangxi Changjiu Expressway, Hebei G106 National Highway, etc.) have verified its maturity and reliability.